using UnityEngine;
using Cinemachine;
using AibisDream.Kit;
using AibisDream.Utility;
using System.Linq;
using AibisDream.Framework;
using System;

namespace AibisDream
{
    public class BlockPuzzleSystem : Singleton<BlockPuzzleSystem>
    {
        [Header("物体索引")]
        // 物体索引
        [SerializeField] public BlockPuzzleGrid grid;
        [SerializeField] private Transform shapeRoot;
        [SerializeField] public BlockPuzzlePanel blockPuzzlePanel;
        [SerializeField] private ShapeRecycleSlot shapeRecycleSlot;

        [Header("数据")]
        [SerializeField] private BlockPuzzleData puzzleData;
        [SerializeField] private bool initializeOnStart = true;

        private BlockPuzzleValidator validator;
        private ShapeFactory shapeFactory;

        private void Start()
        {
            if (initializeOnStart)
            {
                Initialize();
            }

            CameraKit.Instance?.RegisterCamera(CameraEnum.BlockPuzzle, GetComponentInChildren<ICinemachineCamera>());
        }

        public override void OnSingletonDestroy()
        {
            CameraKit.Instance?.UnRegisterCamera(CameraEnum.BlockPuzzle);
        }

        public void Initialize(BlockPuzzleData puzzleData)
        {
            this.puzzleData = puzzleData;
            ClearGame();
            Initialize();
        }

        public void Initialize()
        {
            // 初始化网格
            grid.Initialize(puzzleData.gridWidth, puzzleData.gridHeight, puzzleData.cellSize);
            // 初始化网格上图形
            shapeFactory = new ShapeFactory(shapeRoot);
            foreach (var shapeData in puzzleData.gridShapeDataInfos)
            {
                var shape = shapeFactory.CreateBlockShape(shapeData.shapeKey);
                shape.Rotate(shapeData.rotationAngle);
                grid.TrySnapToGrid(shape, shapeData.rootCell);
                shape.GetComponent<ShapeDragger>().IsDraggable = shapeData.isDraggable;
            }

            grid.GridVisualizer.UpdateAllCellsVisual();

            // 加载验证器
            validator = ResourceKit.LoadAssetSync<BlockPuzzleValidator>(puzzleData.validatorName);

            // 组装事件逻辑
            AssembleEventLogic();

            Debug.Log("网格系统初始化完成");
        }

        private void PreCheckGameState()
        {
            var shapes = grid.GetShapes();
            var validateResult = validator.Validate(shapes);
        }

        private void SubmitGameResult()
        {
            var shapes = grid.GetShapes();
            var validateResult = validator.Validate(shapes);

            // 如果验证通过, 则设置变量并弹出对话
            if (validateResult.isPass)
            {
                StorageSystem.Instance.SetValue("$block_puzzle_pass", true);
                DialogController.Instance.StartDialogNode("方块拼图完成");
            }
        }

        public void ClearGame()
        {
            grid.Clear();
            // shapeRack.Clear();
            shapeRoot.DestroyAllChildren();
        }

        // --------------------- 维修面板同步 -------------------

        private string selectedShapeName;

        /// <summary>
        /// 组装各系统之间相互逻辑
        /// </summary>
        private void AssembleEventLogic()
        {
            // 由面板触发
            blockPuzzlePanel.Panel.OnDeviceSelected += OnPanelShapeSelected;
            blockPuzzlePanel.Panel.OnSubmit.AddListener(SubmitGameResult);
            blockPuzzlePanel.Panel.OnPopUp.AddListener(PopUpShape);

            // 由网格触发
            grid.OnShapePlaced += PreCheckGameState;

            // 由Shape触发
            shapeFactory.OnDragStart += OnShapeDragStart;
            shapeFactory.OnDragEnd += OnShapeDragEnd;
            shapeFactory.OnDragUpdate += OnShapeDragUpdate;
        }

        private void OnPanelShapeSelected(BlockShapeInfo shapeData)
        {
            // 在屏幕上更新选中的图形
            selectedShapeName = shapeData.shapeName;
            blockPuzzlePanel.ShowShapeInScreen(shapeData);
        }

        public void OnValidateResult(ValidateResult validateResult)
        {
            // 先更新进度条

            // 再更新校验结果，包括锁定按钮等UI

        }

        public void OnShapeDragStart(IBlockShape blockShape)
        {
            // 更新选中图形

            // 回收抽屉高亮，半开
            shapeRecycleSlot.PreRecycle();
            shapeRecycleSlot.SetRecycleAvaliable(true);
        }

        public void OnShapeDragEnd(IBlockShape blockShape, bool isPlaced)
        {
            // 

            // TODO: 如果吸附到回收处，应该播放动画，并提示回收成功
        }

        public void OnShapeDragUpdate(IBlockShape blockShape)
        {
            // 更新回收槽状态
            shapeRecycleSlot.UpdateSlotState(blockShape);
        }
        
        public void PopUpShape()
        {
            if (selectedShapeName == null)
            {
                return;
            }

            // 弹出形状
            var blockShape = shapeFactory.CreateBlockShape(selectedShapeName);
            shapeRecycleSlot.PopUpShape(blockShape);
            blockShape.GetComponent<ShapeDragger>().CurrentState = DragState.Idle;

            // 删除按钮
            blockPuzzlePanel.Panel.RemoveDeviceButton(selectedShapeName);
            selectedShapeName = null;
            blockPuzzlePanel.ClearShapeInScreen();
        }

        // --------------------- 吸附校验 ---------------------

        public bool TrySnapToRecycleSlot(BlockShape blockShape)
        {
            // 先判断是否吸附到回收槽
            if (shapeRecycleSlot.CurrentState == PositionState.Open)
            {
                shapeRecycleSlot.RecycleShape(blockShape);
                // TODO: 向面板添加回收的形状
                blockPuzzlePanel.Panel.OnDeviceRecycle(blockShape);
                // 延时后进行销毁
                ActionKit.Delay(1.0f, () => {
                    shapeFactory.RecycleBlockShape(blockShape);
                }).Start(this);
                return true;
            }
            return false;
        }

        // ---------------- 编辑器状态逻辑 ----------------

        /// <summary>
        /// 仅加载配置项，不应用到游戏
        /// </summary>
        public void LoadConfig()
        {
            if (BlockPuzzleKit.TryLoadBlockPuzzleData(puzzleData.puzzleName, out var blockPuzzleData))
            {
                puzzleData = blockPuzzleData;
                Debug.Log("加载配置项成功");
            }
            else
            {
                Debug.Log("加载配置项失败");
            }
        }

        /// <summary>
        /// 将配置项应用到编辑器
        /// </summary>
        public void ApplyConfig()
        {
            ClearGame();

            shapeFactory = new ShapeFactory(shapeRoot);
            grid.InitializeInEditor(puzzleData.gridWidth, puzzleData.gridHeight, puzzleData.cellSize);
            // shapeRack.InitInEditor(puzzleData.shapeRackDataInfos);

            foreach (var shapeData in puzzleData.gridShapeDataInfos)
            {
                var shape = shapeFactory.CreateBlockShape(shapeData.shapeKey);
                shape.Rotate(shapeData.rotationAngle);
                grid.TrySnapToGrid(shape, shapeData.rootCell);
            }
        }

        public void SaveConfig()
        {
            var gridShapeDataInfos = grid.ShapeDict?.Values.ToArray();
            // var shapeRackDataInfos = shapeRack.blockShapeDataList?.ToArray();

            puzzleData.gridShapeDataInfos = gridShapeDataInfos;
            // puzzleData.shapeRackDataInfos = shapeRackDataInfos;

            BlockPuzzleKit.SaveBlockPuzzleData(puzzleData, puzzleData.puzzleName);
        }
        
        public void CreateShapeInEditor(string shapeKey)
        {
            if (shapeFactory == null)
            {
                shapeFactory = new ShapeFactory(shapeRoot);
            }
            shapeFactory.CreateBlockShape(shapeKey);
        }
    }
}